For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningAir Conditioning Compressor and Condenser Hose Replacement (1.6L LXT)
Removal Procedure
Recover the refrigerant. Refer to Refrigerant Rec overy and
Recharging.
Remove front bumper fascia. Refer to Front Bumper Fascia Replacement.
Remove A/C compressor and condenser hose nut (1) from A/C condensor (2).
Remove A/C compressor and ...
Recommended Fuel
Use regular unleaded gasoline with a posted octane rating of 87 or higher. If
the octane rating is less than 87, an audible knocking noise, commonly referred
to as spark knock, might be heard when driving.
If this occurs, use a gasoline rated at 87 octane or higher as soon as possible.
If hea ...
Rear Window Defogger Description and Operation
Rear Window Defogger System Components
The rear window defogger system consists of the following components:
HVAC Control Module
HVAC Control Head
Rear Window Defogger Relay
Rear Defogger Grid
F28UA 40A Fuse
Rear Window Defogger Operation
The rear defog control system utilizes a sin ...